161606115106504 has 16 divisors (see below), whose sum is σ = 303011649579420. Its totient is φ = 80803008552000.

The previous prime is 161606115106459. The next prime is 161606115106507. The reversal of 161606115106504 is 405601511606161.

It can be written as a sum of positive squares in 2 ways, for example, as 103296122440900 + 58309992665604 = 10163470^2 + 7636098^2 .

It is a super-2 number, since 2×161606115106504² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161606115106507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10567254 + ... + 20853754.

Almost surely, 2^{161606115106504} is an apocalyptic number.

It is an amenable number.

161606115106504 is a deficient number, since it is larger than the sum of its proper divisors (141405534472916).

161606115106504 is a wasteful number, since it uses less digits than its factorization.

161606115106504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12250320 (or 12250316 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 43.

The spelling of 161606115106504 in words is "one hundred sixty-one trillion, six hundred six billion, one hundred fifteen million, one hundred six thousand, five hundred four".